1#ifndef __LINUX_SPINLOCK_TYPES_H
2#define __LINUX_SPINLOCK_TYPES_H
3
4/*
5 * include/linux/spinlock_types.h - generic spinlock type definitions
6 *                                  and initializers
7 *
8 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
9 * Released under the General Public License (GPL).
10 */
11
12#if defined(CONFIG_SMP)
13# include <asm/spinlock_types.h>
14#else
15# include <linux/spinlock_types_up.h>
16#endif
17
18#include <linux/lockdep.h>
19
20typedef struct raw_spinlock {
21	arch_spinlock_t raw_lock;
22#ifdef CONFIG_GENERIC_LOCKBREAK
23	unsigned int break_lock;
24#endif
25#ifdef CONFIG_DEBUG_SPINLOCK
26	unsigned int magic, owner_cpu;
27	void *owner;
28#endif
29#ifdef CONFIG_DEBUG_LOCK_ALLOC
30	struct lockdep_map dep_map;
31#endif
32} raw_spinlock_t;
33
34#define SPINLOCK_MAGIC		0xdead4ead
35
36#define SPINLOCK_OWNER_INIT	((void *)-1L)
37
38#ifdef CONFIG_DEBUG_LOCK_ALLOC
39# define SPIN_DEP_MAP_INIT(lockname)	.dep_map = { .name = #lockname }
40#else
41# define SPIN_DEP_MAP_INIT(lockname)
42#endif
43
44#ifdef CONFIG_DEBUG_SPINLOCK
45# define SPIN_DEBUG_INIT(lockname)		\
46	.magic = SPINLOCK_MAGIC,		\
47	.owner_cpu = -1,			\
48	.owner = SPINLOCK_OWNER_INIT,
49#else
50# define SPIN_DEBUG_INIT(lockname)
51#endif
52
53#define __RAW_SPIN_LOCK_INITIALIZER(lockname)	\
54	{					\
55	.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED,	\
56	SPIN_DEBUG_INIT(lockname)		\
57	SPIN_DEP_MAP_INIT(lockname) }
58
59#define __RAW_SPIN_LOCK_UNLOCKED(lockname)	\
60	(raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
61
62#define DEFINE_RAW_SPINLOCK(x)	raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
63
64typedef struct spinlock {
65	union {
66		struct raw_spinlock rlock;
67
68#ifdef CONFIG_DEBUG_LOCK_ALLOC
69# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
70		struct {
71			u8 __padding[LOCK_PADSIZE];
72			struct lockdep_map dep_map;
73		};
74#endif
75	};
76} spinlock_t;
77
78#define __SPIN_LOCK_INITIALIZER(lockname) \
79	{ { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }
80
81#define __SPIN_LOCK_UNLOCKED(lockname) \
82	(spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)
83
84#define DEFINE_SPINLOCK(x)	spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
85
86#include <linux/rwlock_types.h>
87
88#endif /* __LINUX_SPINLOCK_TYPES_H */
89